1.star driver,bit driver,security bit 2.materal:s2 3.Surface:sandblasted 4.Model Nomber: ... SBF-151-163 star driver,bit driver,security bit1.Material types:Cr-V 6150,8660,S22.Surface treatment ... :PH, PZ, slot, Torx, square, hex, hex-plus, Z-spanner, Torx hollow, Torx plus, tri-wing4.length:505.Special heat-treated6.property ...